﻿using System;
using System.Linq;

class PrintIntegersSum
{
    static void Main(string[] args)
    {
        // Read integers from console
        string input = Console.ReadLine ();
        int integer1 = int.Parse(input);

        input = Console.ReadLine ();
        int integer2 = int.Parse(input);

        input = Console.ReadLine ();
        int integer3 = int.Parse(input);

        // Calculate sum as long, due to integer range
        long sum = (long)integer1 + integer2 + integer3;

        // Print the result
        Console.WriteLine (sum);
    }
}